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    <meta charset="UTF-8">
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        function evenSum() {//偶数
            let sum = 0;
            for (let i = 0; i < 101; i++) {
                if (i % 2 == 0) {
                    sum = sum + i;
                }
            }
            return sum;
        }
        function oddSum() {//奇数
            let sum = 0;
            for (let i = 0; i < 101; i++) {
                if (i % 2 == 1) {
                    sum = sum + i;
                }
            }
            return sum;
        }
        let result1 = evenSum();
        let result2 = oddSum();
        console.log(result1, result2);// 2550,2500
    </script>
</body>

</html>